|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Dynamic.Utils;
namespace System.Linq.Expressions.Interpreter
{
internal abstract class RightShiftInstruction : Instruction
{
private static Instruction? s_SByte, s_Int16, s_Int32, s_Int64, s_Byte, s_UInt16, s_UInt32, s_UInt64;
public override int ConsumedStack => 2;
public override int ProducedStack => 1;
public override string InstructionName => "RightShift";
private RightShiftInstruction() { }
private sealed class RightShiftSByte : RightShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push((sbyte)((sbyte)value >> (int)shift));
}
return 1;
}
}
private sealed class RightShiftInt16 : RightShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push((short)((short)value >> (int)shift));
}
return 1;
}
}
private sealed class RightShiftInt32 : RightShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push((int)value >> (int)shift);
}
return 1;
}
}
private sealed class RightShiftInt64 : RightShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push((long)value >> (int)shift);
}
return 1;
}
}
private sealed class RightShiftByte : RightShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push((byte)((byte)value >> (int)shift));
}
return 1;
}
}
private sealed class RightShiftUInt16 : RightShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push((ushort)((ushort)value >> (int)shift));
}
return 1;
}
}
private sealed class RightShiftUInt32 : RightShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push((uint)value >> (int)shift);
}
return 1;
}
}
private sealed class RightShiftUInt64 : RightShiftInstruction
{
public override int Run(InterpretedFrame frame)
{
object? shift = frame.Pop();
object? value = frame.Pop();
if (value == null || shift == null)
{
frame.Push(null);
}
else
{
frame.Push((ulong)value >> (int)shift);
}
return 1;
}
}
public static Instruction Create(Type type)
{
return type.GetNonNullableType().GetTypeCode() switch
{
TypeCode.SByte => s_SByte ??= new RightShiftSByte(),
TypeCode.Int16 => s_Int16 ??= new RightShiftInt16(),
TypeCode.Int32 => s_Int32 ??= new RightShiftInt32(),
TypeCode.Int64 => s_Int64 ??= new RightShiftInt64(),
TypeCode.Byte => s_Byte ??= new RightShiftByte(),
TypeCode.UInt16 => s_UInt16 ??= new RightShiftUInt16(),
TypeCode.UInt32 => s_UInt32 ??= new RightShiftUInt32(),
TypeCode.UInt64 => s_UInt64 ??= new RightShiftUInt64(),
_ => throw ContractUtils.Unreachable,
};
}
}
}
|